Дисертації з теми "Spatial spreads"
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Lindström, Tom. "Spatial Spread of Organisms : Modeling ecological and epidemiological processes." Doctoral thesis, Linköpings universitet, Teoretisk Biologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54839.
Повний текст джерелаVernon, Matthew Christopher. "Spatial spread of farm animal diseases." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/240490.
Повний текст джерелаJanarthanan, Sivarjalingam. "Spatial spread in general branching processes." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265577.
Повний текст джерелаBastani, Hamed [Verfasser]. "Spatial Positioning with Wireless Chirp Spread Spectrum Ranging / Hamed Bastani." Bremen : IRC-Library, Information Resource Center der Jacobs University Bremen, 2010. http://d-nb.info/1034989510/34.
Повний текст джерелаBall, George LeRoy. "A spatial dynamic approach to ecological modeling: Simulating fire spread." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/184986.
Повний текст джерелаYassi, Hocine. "Finite element model for the two dimensional spatial spread of rabies." Thesis, Bangor University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318087.
Повний текст джерелаHollingsworth, Teresa Déirdre. "A theoretical framework for the spatial spread of soil-borne fungal plant pathogens." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604173.
Повний текст джерелаSmith, James Martin Derek. "Modelling the spatial spread of Japanese knotweed (Fallopia japonica) in the United Kingdom." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/33778.
Повний текст джерелаChurakov, Mikhail. "Spatial and network aspects of the spread of infectious diseases in livestock populations." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/6417/.
Повний текст джерелаSkog, Lars. "Spatial Analysis and Modeling for Health Applications." Doctoral thesis, KTH, Geodesi och geoinformatik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142835.
Повний текст джерелаQC 20140313
Pande, Rishikesh A. "Using Plant Epidemiological Methods to Track Computer Network Worms." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9943.
Повний текст джерелаMaster of Science
Bessell, Paul R. "Spatial epidemiology of Foot and Mouth Disease in Great Britain." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/4831.
Повний текст джерелаRama, Parbavati. "Placing the dead :the spatial distribution and spread of HIV in a major South African city." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&.
Повний текст джерелаMartin, Vincent. "Spatial ecology of the persistence and spread of highly pathogenic avian influenza, H5N1 in Southern China." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209760.
Повний текст джерелаDans ce cadre, des données spatio-temporelles relatives aux foyers de la maladie ainsi que des données de surveillance virologiques (isolement du virus effectué dans le cadre du système de surveillance nationale) ont été collectées sur une période de quatre ans et analysées afin d’éxplorer les facteurs de risque relatifs à l’émergence et persistence de la maladie dans certaine zones de production du sud de la Chine. Les analyses ainsi effectuées ont permis d’identifier, à travers l’utilisation de méthodes statistiques robustes ayant fait leur preuve dans le domaine de la santé ou de l’écologie (la régression logistique classique et les arbres de regression logistique), des facteurs de risque liés à certains types de production de volailles (canards élevés en plein air, zones riches en eau et par extension associées à la riziculture) ou des facteurs associés à l’activité humaine. A travers une représentation cartographique des facteurs ainsi identifiés, des cartes de risque ont été produites permettant ainsi de visualiser d’une part les zones à haut risque de persistence de l’infection virale et d’autre part les zones vulnérables à l’apparition de foyers de la maladie, donnant aux autorités nationales la possibilité de mieux cibler leurs politiques de surveillance et de contrôle.
Dans un second temps, notre étude s’est portée sur les marchés à volailles traditionnels du sud de la Chine qui représentent un risque permanent de persistence, d’évolution et de diffusion des virus influenza aviaires, ainsi qu’un risque important en matière de santé publique. La dynamique de ces marchés et les liens qui les unissent ont été étudiés à travers des outils d’analyse empruntés à la sociologie tels que l’Analyse des Réseaux Sociaux (Social Network Analysis). Grace à cette approche, l’importance de l’hygiène de ces marchés et notamment du nettoyage et de la désinfection des cages dans la persistence du virus a été mise en évidence. Enfin, des enquêtes effectuées auprès des vendeurs de volailles ont permis d’identifier l’origine et la destination des animaux vendus et de reconstruire des réseaux plus ou moins intriqués de liens commerciaux qui unissent ces marchés entre eux dans trois provinces du sud de la Chine. L’analyse de ces réseaux et de leurs configurations ont permis d’identifier des marchés à plus haut risque de persistence de l’infection du fait de leur position centrale au sein de ces réseaux. De même qu’il est indispensable de cibler la surveillance et le contrôle de la maladie dans des zones écologiquement favorables à la persistence des virus influenza aviaires, cette étude révèle l’importance de certaines pratiques hygiéniques et commerciales dans la persistence de la maladie et la nécessité de cibler la surveillance et le contrôle au niveau de certains de ces marchés situés au centre d’un réseau dense et connecté, pour pouvoir in fine mieux contrôler la maladie au niveau national.
Doctorat en Sciences agronomiques et ingénierie biologique
info:eu-repo/semantics/nonPublished
Ingelgård, Marcus. "Determinants of the Premium in Futures on the Spatial Price Spread in the Nordic Electricity Market." Thesis, Örebro universitet, Handelshögskolan vid Örebro Universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-75361.
Повний текст джерелаJanne, Odile E. M. "The changing geographical spread of corporate technological activity in Europe : the dynamics of corporate technological strategies and the hierarchy of innovative centres." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343345.
Повний текст джерелаRaber, Erica Candace. "SPATIAL RESOLUTION CHARACTERIZATION OF IMAGES TAKEN FROM A CAPILLARY-BASED HIGH PRESSURE CHAMBER FOR BIOLOGICAL IMAGING STUDIES." Miami University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=miami1154702307.
Повний текст джерелаAlqawasmeh, Yousef. "Models for Persistence and Spread of Structured Populations in Patchy Landscapes." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36845.
Повний текст джерелаVanBuren, John Matthew. "Integrating independent spatio-temporal replications to assess population trends in disease spread." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/5669.
Повний текст джерелаYñiguez, Aletta Tiangco. "Spatial Dynamics in the Growth and Spread of Halimeda and Dictyota in Florida reefs: A Simulation Modeling Approach." Scholarly Repository, 2007. http://scholarlyrepository.miami.edu/oa_dissertations/62.
Повний текст джерелаGabriele-Rivet, Vanessa. "Potential spread of rabies in dingo populations of northern Australia." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/24319.
Повний текст джерелаIkai, Youhei, Masaaki Katayama, Takaya Yamazato, and Akira Ogawa. "An Initial Code Acquisition Scheme for Indoor Packet DS/SS Systems with Macro/Micro Antenna Diversity." IEICE, 2000. http://hdl.handle.net/2237/7220.
Повний текст джерелаPrice, Stephen J. "Emergence of a virulent wildlife disease : using spatial epidemiology and phylogenetic methods to reconstruct the spread of amphibian viruses." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8851.
Повний текст джерелаSieracki, Jennifer L. "Spatial Modeling as a Decision-making Tool for Invasive Species Management in the Great Lakes." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1408630726.
Повний текст джерелаRussell, Thembi M. "The spatial analysis of radiocarbon databases : the spread of the first farmers in Europe and of the fat-tailed sheep in Southern Africa." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269940.
Повний текст джерелаRussell, Thembi M. "The spatial analysis of radiocarbon databases the spread of the first farmers in Europe and of the fat-tailed sheep in Southern Africa /." Oxford : Archaeopress, 2004. http://books.google.com/books?id=Vi9mAAAAMAAJ.
Повний текст джерелаKoss, Jeffrey David. "Spatial and temporal patterns in the spread of influenza A and B viruses in the United States during the 2016-17 influenza season." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6163.
Повний текст джерелаXue, Ling. "Modeling and analysis of vector-borne diseases on complex networks." Diss., Kansas State University, 2013. http://hdl.handle.net/2097/16788.
Повний текст джерелаDepartment of Electrical and Computer Engineering
Caterina Scoglio
Vector-borne diseases not only cause devastating economic losses, they also significantly impact human health in terms of morbidity and mortality. From an economical and humane point of view, mitigation and control of vector-borne diseases are essential. Studying dynamics of vector-borne disease transmission is a challenging task because vector-borne diseases show complex dynamics impacted by a wide range of ecological factors. Understanding these factors is important for the development of mitigation and control strategies. Mathematical models have been commonly used to translate assumptions concerning biological (medical, demographical, behavioral, immunological) aspects into mathematics, linking biological processes of transmission and dynamics of infection at population level. Mathematical analysis translates results back into biology. Classical deterministic epidemic models do not consider spatial variation, assuming space is homogeneous. Spatial spread of vector-borne diseases observed many times highlights the necessity of incorporating spatial dynamics into mathematical models. Heterogeneous demography, geography, and ecology in various regions may result in different epidemiological characteristics. Network approach is commonly used to study spatial evolution of communicable diseases transmitted among connected populations. In this dissertation, the spread of vector-borne diseases in time and space, is studied to understand factors that contribute to disease evolution. Network-based models have been developed to capture different features of disease transmission in various environments. Network nodes represent geographical locations, and the weights represent the level of contact between regional pairings. Two competent vector populations, Aedes mosquitoes and Culex mosquitoes, and two host populations, cattle and humans were considered. The deterministic model was applied to the 2010 Rift Valley fever outbreak in three provinces of South Africa. Trends and timing of the outbreak in animals and humans were reproduced. The deterministic model with stochastic parameters was applied to hypothetical Rift Valley fever outbreak on a large network in Texas, the United States. The role of starting location and size of initial infection in Rift Valley fever virus spread were studied under various scenarios on a large-scale network. The reproduction number, defined as the number of secondary infections produced by one infected individual in a completely susceptible population, is typically considered an epidemic threshold of determining whether a disease can persist in a population. Extinction thresholds for corresponding Continuous-time Markov chain model is used to predict whether a disease can perish in a stochastic setting. The network level reproduction number for diseases vertically and horizontally transmitted among multiple species on heterogeneous networks was derived to predict whether a disease can invade the whole system in a deterministic setting. The complexity of computing the reproduction number is reduced because the expression of the reproduction number is the spectral radius of a matrix whose size is smaller than the original next generation matrix. The expression of the reproduction number may have a wide range of applications to many vector-borne diseases. Reproduction numbers can vary from below one to above one or from above one to below one by changing movement rates in different scenarios. The observations provide guidelines on executing movement bans in case of an epidemic. To compute the extinction threshold, corresponding Markov chain process is approximated near disease free equilibrium. The extinction threshold for Continuous-time Markov chain model was analytically connected to the reproduction number under some assumptions. Numerical simulation results agree with analytical results without assumptions, proposing a mathematical problem of proving the existence of the relationships in general. The distance of the extinction threshold were shown to be closer to one than the reproduction number. Consistent trends of probability of extinction varying with disease parameters observed through numerical simulations provide novel insights into disease mitigation, control, and elimination.
Jammalamadaka, Rajanikanth. "Multilevel Methodology For Simulation Of Spatio-Temporal Systems With Heterogeneous Activity: Application To Spread Of Valley Fever Fungus." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/193519.
Повний текст джерелаHaran, Julien. "Dispersion des espèces impliquées dans une association phorétique vecteur - pathogène nouvellement formée : le cas de Monochamus galloprovincialis, vecteur natif d’un nématode invasif en Europe (Bursaphelenchus xylophilus)." Thesis, Orléans, 2015. http://www.theses.fr/2015ORLE2046/document.
Повний текст джерелаBiological invasions dramatically increased over the last decades due to the intensification of international trade. These invasions constitute a threat for ecosystems and many anthropic activities, therefore it is crucial to understand underlying processes in order to better predict and manage their impacts. In this PhD thesis, I explore the potential of dispersion of native and non-native species involved in a novel phoretic association. I focus on the case of the association between a pest for pine forests, the pinewood nematode (Bursaphelenchus xylophilus) introduced in Europe, and its endemic insect vector (Monochamus galloprovincialis). I first estimated gene flows of the insect vector alone in order to identify the barriers and corridors to dispersal of this species. Then I have simulated the spatial spread of the nematode-vector couple using a spread model, and accounting for the synergistic effect of this novel association. The results obtained during this PhD showed that the invasive nematode has an important potential to spread through this phoretic association. However, some environmental features such as elevation, areas with low temperatures, and the high pine densities constitute barriers to dispersal of the vector and so, potential obstacles to the spread of the invasive nematode. Beyond these results focused on the model of study, this thesis has led to the development of several methods that may be adapted to other cases of novel phoretic association and, by extension, may contribute to a better understanding of dispersal of species involved in those complex and poorly known systems
Winkler, Eckart, and Thilo Heinken. "Spread of an ant-dispersed annual herb : an individual-based simulation study on population development of Melampyrum pratense L." Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2010/4649/.
Повний текст джерелаYu, Yi. "Radio Resource Planning in Low Power Wide Area IoT Networks." Electronic Thesis or Diss., Paris, CNAM, 2021. http://www.theses.fr/2021CNAM1287.
Повний текст джерелаIn this thesis, we focus on radio resource planning issues for low power wide area networks based on NB-IoT and LoRa technologies. In both cases, the average behavior of the network is considered by assuming the sensors and the collectors are distributed according to independent random Poisson Point Process marked by the channel randomness. For the NB-IoT, we elaborate a statistical dimensioning model that estimates the number of radio resources in the network depending on the tolerated delay access, the density of active nodes, the collectors, and the antenna configuration with single and multi-user transmission. For the LoRa network, we propose a multi-sub band allocation technique to mitigate the high level of interference induced by nodes that transmit with the same spreading factor. To dynamically allocate the spreading factor and the power, we present a Q-learning multi-agent approach to improve the energy efficiency
Van, Winkle Jill Elise. "Informal Trails and the Spread of Invasive Species in Urban Natural Areas: Spatial Analysis of Informal Trails and their Effects on Understory Plant Communities in Forest Park, Portland, Oregon." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1841.
Повний текст джерелаWilms, Marcus. "Electrical receptive fields and cortical activation spread in response to electrical retina stimulation assessment of spatio-temporal resolution for a retina implant /." [S.l.] : [s.n.], 2001. http://archiv.ub.uni-marburg.de/diss/z2002/0084/.
Повний текст джерелаJacquart, Thierry. "Structure génétique et phylogénie intraspécifique chez la souris sauvage Mus spretus Lataste : distribution spatiale du polymorphisme des gènes nucléaires de structure et de l'ADN mitochondrial." Montpellier 2, 1986. http://www.theses.fr/1986MON20053.
Повний текст джерелаRaichur, Rohan. "A Novel Technique to Improve the Resolution and Contrast of Planar Nuclear Medicine Imaging." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1226955205.
Повний текст джерелаJacquart, Thierry. "Structure génétique et phylogénie intra-spécifique chez la souris sauvage Mus spretus (Lataste, 1883) distribution spatiale du polymorphisme des gènes nucléaires de structure et de l'ADN." Grenoble : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37598420q.
Повний текст джерелаNordqvist, Linn. "Ett smittfritt handlande : En studie om utformningen av matbutiker för att minska trängsel." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-55175.
Повний текст джерелаThis thesis aims to investigate how grocery stores can be designed to make it easier for visitors to keep their distance and avoid crowding in order to reduce the spread of viruses. The focus of the study is on spatial design in combination with visual information. Collected theories as well as the use of methods such as location analysis, benchmarking, observations, behavioral mapping, interview and focus group, have provided an understanding of what the problem could be and what is needed to create the right conditions for shop visitors to avoid crowding. Based on this, a design proposal has been developed on how spatial design and visual information can be used in stores to control the customer flow. The design proposal consists of one-way paths with associated information that guide visitors through the store.
Sallah, Kankoe. "Diffusion spatio-temporelle des épidémies : approche comparée des modélisations mathématiques et biostatistiques, cibles d'intervention et mobilité humaine." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0607.
Повний текст джерелаIn the first part of this thesis, we have developed a malaria transmission metamodel based on the susceptible-infected-resistant compartmental modeling framework (SIR) and taking into consideration human mobility flows between different villages in the Center of Senegal. Geographically targeted intervention strategies had been shown to be effective in reducing the incidence of malaria both within and outside of intervention areas. However, combined interventions targeting both vector and host, coordinated on a large scale are needed in regions and countries aiming to achieve malaria elimination in the short/medium term.In the second part we have evaluated different methods of estimating human mobility in the absence of real data. These methods included spatio-temporal traceability of mobile phones, mathematical models of gravity and radiation. The transport of the pathogen through the geographical space via the mobility of an infected subject is a major determinant of the spread of an epidemic. We introduced the impedance model that minimized the mean square error on mobility estimates, especially in contexts where population sets are characterized by their heterogeneous sizes.Finally, we have expanded the framework of assumptions underlying the calibration of the gravity models of human mobility. The hypothesis of a zero inflated distribution provided a better fit and a better predictability, compared to the classical approach not assuming an excess of zeros: Poisson, Quasipoisson
Imanzadeh, Saber. "Effets des incertitudes et de la variabilité spatiale des propriétés des sols et des structures sur le dimensionnement des semelles filantes et des conduites enterrées." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00803563.
Повний текст джерелаViljanen-Rollinson, S. L. H. "Expression and detection of quantitative resistance to Erysiphe pisi DC. in pea (Pisum sativum L.)." Lincoln University, 1996. http://hdl.handle.net/10182/1657.
Повний текст джерелаHunter, Brandon. "Channel Probing for an Indoor Wireless Communications Channel." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/64.
Повний текст джерелаZáhlava, Josef. "Sovereign credit risk drivers in a spatial perspective." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-373012.
Повний текст джерелаDubey, Agrita. "Estimation of the spatial spread of brain signals at multiple scales." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/5296.
Повний текст джерела"Spatial spread of rabies in wildlife." Doctoral diss., 2013. http://hdl.handle.net/2286/R.I.20921.
Повний текст джерелаDissertation/Thesis
Ph.D. Mathematics 2013
Fulcher, Corinne, Paul V. McGraw, N. W. Roach, David J. Whitaker, and James Heron. "Object size determines the spatial spread of visual time." 2016. http://hdl.handle.net/10454/8751.
Повний текст джерелаA key question for temporal processing research is how the nervous system extracts event duration, despite a notable lack of neural structures dedicated to duration encoding. This is in stark contrast with the orderly arrangement of neurons tasked with spatial processing. In this study, we examine the linkage between the spatial and temporal domains. We use sensory adaptation techniques to generate after-effects where perceived duration is either compressed or expanded in the opposite direction to the adapting stimulus’ duration. Our results indicate that these after-effects are broadly tuned, extending over an area approximately five times the size of the stimulus. This region is directly related to the size of the adapting stimulus—the larger the adapting stimulus the greater the spatial spread of the aftereffect. We construct a simple model to test predictions based on overlapping adapted versus non-adapted neuronal populations and show that our effects cannot be explained by any single, fixed-scale neural filtering. Rather, our effects are best explained by a self-scaled mechanism underpinned by duration selective neurons that also pool spatial information across earlier stages of visual processing.
J.H. is supported by the Vision Research Trust (43069). N.W.R. is supported by a Wellcome Trust Research Career Development Fellowship (WT097387).
"Spread Rate Estimation and the Role of Spatial Configuration and Human Behavior." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.15143.
Повний текст джерелаDissertation/Thesis
M.S. Biology 2012
Liu, Rongsong. "Transmission dynamics and spatial spread of vector borne diseases : modelling, prediction and control /." 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR19847.
Повний текст джерелаTypescript. Includes bibliographical references (leaves 126-132). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR19847
"Biodiversity, Dispersal, and Risk: Species Spread in Ecological and Social-Ecological Systems." Doctoral diss., 2016. http://hdl.handle.net/2286/R.I.40229.
Повний текст джерелаDissertation/Thesis
Doctoral Dissertation Biology 2016
Koutnik, Michael A. "Toward a dynamic spatial model of zebra mussel (Dreissena polymorpha) spread among inland waters of Wisconsin." 1993. http://catalog.hathitrust.org/api/volumes/oclc/32463049.html.
Повний текст джерела